Design of steam pipelines

It seems like the problem is quite serious. The recommendations are as follows: 1. Consider the route of the pipelines carefully, make full use of the available space on site, and appropriately install self-ignition compensation devices (such as Π-shaped compensators). When natural compensation is insufficient to meet the flexibility requirements of the pipeline, wave-shaped expansion joints can be considered. 2. For saturated steam, the pipeline should have an appropriate slope, and a trap must be installed at a suitable location (the lowest point). The choice of trap must meet the requirements of its operating environment. 3. Set up supports scientifically by reasonably arranging the positions of fixed supports, guide supports, and sliding supports according to the route of the pipelines. The necessary time can be addressed by installing spring brackets. 4. Try to avoid using elbows with short radii; based on experience, stress is more concentrated at elbows with short radii compared to those with long radii, which can lead to stress-induced damage. 5. After the pipeline layout is completed, pipe stress analysis using Caesar or other software is required to ensure that the pipes have sufficient flexibility. By adjusting the pipeline design, stress concentration is minimized and the thrust exerted by the fixing supports is reduced, thereby ensuring the safety and reliability of the piping system.

The suggestions from the Haiyou on the upper floor were very detailed; a classmate*,

The one on the 2nd floor is very detailed; there should be experienced formulas for calculation

What was said on the 2nd floor is already very specific; a final stress analysis is definitely necessary

What information is needed to design pipelines in this area, and how is the final spacing and length of the U-shaped bends determined? And the need for bellows.

When laying heat pipes, the first step is to determine the route they will follow, and then consider methods of compensation. Natural compensation should be given priority; this includes L-shaped and Z-shaped compensations. In addition to natural compensation, π-shaped compensators are also necessary. To determine the size of a π-shaped compensator, it is first necessary to calculate the amount of expansion based on the distance between the two fixing points. The formula is: L = 0.012 * L1 * (T1 – T2), where 0.012 is the linear expansion coefficient for carbon steel pipes; for other materials, the appropriate coefficient must be used (carbon steel is generally used for steam pipelines). L1 represents the distance between the two fixing points, T1 is the operating temperature, and T2 is the installation temperature (0 or 5 can be used as values; in reality, the temperature won’t be that low). Using this formula, the amount of expansion can be determined, and then the size of the π-shaped compensator can be selected accordingly. If the compensator is to be installed vertically, it’s simpler, but if it’s to be installed horizontally, it’s necessary to ensure there is enough space. If the compensator is too large and there isn’t enough horizontal space, the distance between the two fixing points needs to be reduced, which will decrease the amount of expansion and thus the size of the required compensating bend. However, this may require more fixing points, depending on the specific conditions at the site. This is a rather general issue, so it’s difficult to give a precise answer. I suggest referring to design manuals for thermal pipelines; I hope this helps.